Power Cables Ampacity

Quit being so flippin' LAZY.

If you are so totally helpless that you can't do your own work, then you should quit asking us to do it for you.

Most of your posts are questions any first year electrician should know. Grow up.

There are literally dozens of charts on the web, and if you weren't so flippin' LAZY you could find them for yourself. Why don't you find some other forum for lazy people and bug them.

Wire Sizing Charts

Good f.....g grief! Get a copy of your local electrical code.

The American Wire Gauge numbering system gives the current rating directly. For example, 10 AWG will carry 10A, 22 AWG will carry 22A etc.

If you intend to trust what you read in an open forum of anonymous members to design your "safe" system, you may as well use my "rule of thumb". It will be particularly "safe" for the higher current/AWG pairings.

You may be confusing that with fast-acting fuse design, especially in the upper ranges.

Quite. But it's very safe (unless holding the wire when power is applied, or working in an explosive atmosphere ).

Or a fusible link? Wink, wink.

If some was to give you a link to the information you want:

A/ would you take the time to read it?

B/ would you understand it if you read it?

You are just taking up space in your position (if you have one), you have nothing to add to any work place!

Looking for a Formula. Check this out.

By definition, No. 36 AWG is 0.0050 inches in diameter, and No. 0000 is 0.4600 inches in diameter. The ratio of these diameters is 92, and there are 40 gauge sizes from No. 36 to No. 0000, or 39 steps. Using this common ratio, wire gauge sizes vary geometrically according to the following formula: The diameter of a No. n AWG wire is

or equivalently

The gauge can be calculated from the diameter using

and the cross-section area is

,

The ASTM B 258-02 standard defines the ratio between successive sizes to be the 39th root of 92, or approximately 1.1229322. ASTM B 258-02 also dictates that wire diameters should be tabulated with no more than 4 significant figures, with a resolution of no more than 0.0001 inches (0.1 mils) for wires larger than No. 44 AWG, and 0.00001 inches (0.01 mils) for wires No. 45 AWG and smaller.

Sizes with multiple zeros are successively larger than No. 0 and can be denoted using "number of zeros/0", for example 4/0 for 0000. For an m/0 AWG wire, use n = −(m−1) = 1−m in the above formulas. For instance, for No. 0000 or 4/0, use n = −3.

Wow!

So much simpler than 10 A/mm² for copper.

British Standard 7671. Again, and again and again....